基于U-I模型的感应电机定子磁链估计的仿真研究  

Simulation of Stator-flux Estimation for Induction Motors Based on U-I Model

作　　者：巫庆辉[1] 邵诚[1] 

机构地区：[1]大连理工大学先进控制研究所,辽宁大连116024

出　　处：《系统仿真学报》2007年第1期89-92,215,共5页Journal of System Simulation

基　　金：国家科技攻关计划资助项目(2001BA204B01)

摘　　要：定子磁场定向的直接转矩控制逐渐被广泛应用于高性能异步电机调速系统。定子磁链估计精度是影响控制系统动态、稳态性能的主要因素。由于定子电阻参数变化及低通滤波器的影响,尤其低速运行时,传统定子磁链估计方法的估计精度及快速性往往很差。提出了一个全新的改进U-I模型定子磁链估计方案,不仅解决了定子电阻整定补偿问题,而且解决了低通滤波器截止频率优化补偿问题。在此基础上,建立直接转矩控制方案的仿真系统,仿真结果表明提出的方案能够使异步电机在低速到高速范围内都能得到令人满意的性能。The stator flux-oriented direct torque control is widely used in high performance motion control of induction motors. But the precise of stator flux estimation for induction motors is essential which influences the dynamic and steady state performance. Due to the stator resistance parameter＇s variance and the low pass filter （LPF）, the classic estimation of stator flux is not satisfactory, especially in low-speed operation. A novel scheme of the stator flux estimation for U-I model was proposed, by which both compensation issues of stator resistance self-tuning and LPF cut-off frequency optimizing were solved effectively. Using the proposed scheme, a simulation system of the novel direct torque control （DTC） scheme was established. The simulation results demonstrate that the induction motor works satisfactorily for a large＂ region from low-speed to high-speed.

关 键 词：可编程低逼滤波器 定子电阻自整定 参考模型自适应系统 直接转矩控制 磁场定向控制 

分 类 号：TM33[电气工程—电机]